Apparatus for making leather-board.



rammed v1am. l, Ism.

A. wi 6A s 6 Y APPARATUS FOR MAKING LEATHER BARD.A

(Appuu'zion'med may 7, 1900.-)

.(No Model.)

venan' fu: Nonms PE1-sas co, Pnoraurno., wAsnmmoN, u c.

UNITED STATES ALFRED WELLS CASE, OF HIGHLAND PARK, CONNECTICUT.

APPARATUS FOR MAKING LEATHER-BOARD.

SPECIFICATION forming part of Letters Patent N o 665,063, dated January 1, 1901.

Application led May 'A7, 1900. beiial No. 15.755. (No model.)

To all whom t may concern:

Be it known that I, ALRED WELLS CASE, a citizen of the United States, and a resident of Highland Park, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Apparatus for Making Leather-Board, of which the following is a specification.

My invention relates to the class of devices for converting a mass of pulp from a more or less fiuid state into sheets of any desired thickness; and the object of the invention is to provide a device of this class in which the material to be treated may be conveniently handled, the moisture readily expelled, and the resultant sheets lnade of any required thickness and density and in any desired number. An apparatus by means of which this object may be attained is illustrated in the accompanying drawings, in which-- Figure l is a view in side elevation of an ap paratus embodying my invention and with parts cut away to illustrate the operation. Fig. 2 is atop view of a follower partly covered with felt. Fig. 3 is an edge view of the saine.A Fig. ais a perspective viewof afralne. Fig. 5 isa view in vertical section through a number of superimposed frames and followers.

My invention is more especially intended for use in making leather-board, although not necessarily limited to such use, as any material in the form of pulp may be treated therein, and in the accompanying drawings the letter a denotes the plunger of a hydraulic press or like device adapted to exert pressure, this plunger being located underneath a platform b, which may be supported, as shown in the drawings, on wheels b, that serve as a means for conveying the frames to any desired position. The upper surface 0f this platform is provided with grooves b2, eX- tending, preferably, from edge to edge and in different directions, and on this platform is placed a felt c. A frame d, constructed of wood or other suitable material, preferably of rectangular form, is placed on the felt, this frame being of considerable strengthto withstand the pressure applied by the press. A

, mass of pulp of the required amount is then allowed to iiow into the frame from a spout e, leading from a pump, vat, or other suitable source of supply. Afollower is then placed on the frame, and this may comprise the follower proper, f, and a table g. The follower tits easily within the frame d and the table g forms a flange g, that overlies the upper surface of the frame CZ. The upper surface of the table is provided with grooves g2, extending preferably from edge to edge and in different directions, as hereinbefore described with reference to the upper surface of the platform b. Another felt c may now be placed upon the table g and other frames d, followersf, and tables g built up in any desired number, these parts, respectively, each being duplicates of the other. After the requisite number of frames have been placed in the stack and filled pressure is applied through the plunger a and against an abutment h, placed above the stack, whereby the moisture is expelled from the mass,runningout through the groovesin the upper surfaces of the platform and tables and the mass formed to the required thickness and of the required density, the latter of course depending -on the amount of pulp that has been placed in the frame and the former on the dierence in thickness between the frame d and the follower f, it being intended to apply pressure enough to cause the flanges g in each instance to touch the upperand undersurfaces of each of the frames d, between which the iianges are located.

It will be observed that the frames which I employ are open-ended and composed of side parts only and that the felt c is a porous device which is interposed between the frame and the support upon which the frame rests, of a nature which will allow water or other liquids to escape freely on substantially all sides from the mass of material being treated when it is put under pressure, thus facilitating rapid working of the device and uniformity in the product produced.

The thickness of the leather-board to be produced may be determined by placing lilling-pieces underneath the anges on the table, this causing the follower to be projected into the frame to a degree depending on the thickness of the fllling-piece,'and thus determining the thickness of the product, or other means for graduating the thickness of the IOO board to be produced may be employed, if desired.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A support having a channeled top, a separate and disconnected frame on the sup port, a follower adapted to fit the fra m e,means for determining the extent of projection of the follower within the frame, and means for exerting pressure upon the parts.

2. A support having a channeled top, a separate and disconnected frame on the support, a follower adapted to fit the frame, a table having a channeled top and located on the follower, means for determining the extent of projection of the follower within the frame, and means for exerting pressure upon the parts.

3. A support having a channeled top, a separateand distinct frame upon the support, the channels in the support extending quite to the edges of the frame on different sides, a follower adapted to fit within the frame, a table integral with the follower and adapted to overlie the frame and having a channeled top, and means for exerting pressure upon the parts, substantially as set forth.

4. A support having a channeled top, a number of separate and disconnected frames adapted to rest on the support, a follower appurtenant to each frame, a table appurtenant to each follower, each table having a channeled top, means for preventing the entrance of pulp into said channels, means for determining the extent of projection of the eeaoee followers within the frames, and means for exerting pressure upon the parts.

5. 'A portable support having a channeled top, means for moving said support, a frame on the support, a follower adapted to lit the frame, means for determining the extent of projection of the follower within the frame, and means for exerting pressure upon the parts.

G. The combination of a support, a separate and distinct frame upon the support coma posed of side parts only, means interposed between the frame and the support which will permit the escape of liquids, and means wherebypressure may be applied to material placed within the frame, substantially asset forth.

7. The combination of a support, an openended frame composed of side parts only rest ing on such support, means inierposed between the frame and the support which will permit the escape of liquids from within the f 'ame, a follower arranged to fit closely within the frame whereby it may serve to coinpress the material placed therein, and a table secured to one face of the follower and extending outward beyond the same in all directions, whereby it serves as a support for another open-ended frame, substantially as set forth.

' ALFRED WELLS CASE.

Witnesses:

CHAs. L. BURDETT, ARTHUR B. JENKINS. 

